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Aqueous nickel(II) hydroxycarbonate instead of nickel(0) colloids as precursors of stable Ni-silica based catalysts for the dry reforming of methane
Catalysis Communications ( IF 3.7 ) Pub Date : 2020-02-06 , DOI: 10.1016/j.catcom.2020.105953
Oscar Daoura , Ghenwa El Chawich , Maya Boutros , Nissrine El Hassan , Pascale Massiani , Ovidiu Ersen , Walid Baaziz , Franck Launay

Nickel(II) hydroxycarbonate colloids were synthesized in water by the reaction of nickel(II) with carbonate in the presence of hexadecyltrimethylammonium bromide. Then, they were dispersed onto SBA-15 affording, after calcination and reduction, a supported 3 wt% nickel(0) catalyst for the dry reforming of methane (DRM). This material, compared to reference ones obtained by impregnation, either by organic Ni(0) colloids or by aqueous nickel(II), was characterized by small nickel nanoparticles leading to improved activity and stability. Such use of aqueous nickel(II) hydroxycarbonate colloids instead of organic Ni(0) ones synthesized with harmful reagents is a new and a more efficient and environment-friendly approach.



中文翻译:

羟基碳酸镍(II)水溶液代替镍(0)胶体作为甲烷干法重整用稳定的基于Ni-二氧化硅的催化剂的前体

羟基碳酸镍(II)胶体是在十六烷基三甲基溴化铵存在下,通过镍(II)与碳酸盐的反应在水中合成的。然后,将它们分散到SBA-15上,在煅烧和还原后,可提供一种负载的3 wt%的镍(0)催化剂用于甲烷(DRM)的干重整。与通过有机Ni(0)胶体或含水镍(II)浸渍获得的参考材料相比,该材料的特点是镍纳米颗粒小,从而提高了活性和稳定性。这种使用水性羟基碳酸镍(II)胶体代替由有害试剂合成的有机Ni(0)的方法是一种新的,更有效和环保的方法。

更新日期:2020-02-07
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